The following is the important information of Via AC 97 Audio Controller WDM installation driver.

Driver Installation instructions for Sound Cards Only.Important! These instructions may not be applicable to other audio devices.

Click on Download Now and a File Download box will appear.
Select Save This Program to Disk and a Save As box will appear.
Select a directory to save the driver in and click Save.
Locate the driver file using Windows Explorer when the download has completed.

Running the downloaded file will extract all the driver files and setup program into a directory on your hard drive.
The directory these driver are extracted to will have a similar name to the AC 97 Audio Controller WDM model that was downloaded (i.e., c:\AC 97 Audio Controller WDM). The setup program will also automatically begin running after extraction.
However, automatically running setup can be unchecked at the time of extracting the driver file.

Turn your computer power off.

Connect the Via AC 97 Audio Controller WDM to your computer.

Turn on your computer. When the AC 97 Audio Controller WDM is first connected to the your computer, the Windows dialog called "Add New Hardware Wizard" will appear automatically. (To display this dialog manually, you can choose the Start
button and then Settings to access the Control Panel, and then double click on Add New Hardware. The Via AC 97 Audio Controller WDM needs to be connected first.)

The Add New Hardware Wizard dialog box guides you through the driver installation process. Click on Next to move from step to step.

A dialog states "Windows will now search for any new Plug and Play devices on your system". Click Next.

A subsequent dialog gives you these options:
Search for the best driver for your AC 97 Audio Controller WDM (Recommended)
Display a list of all drivers in a specific location, so you can select the
driver you want.
Please accept the recommended choice by clicking on Next.

The Wizard will then search your hard drive for a file called ..... *****.inf (for example AC 97 Audio Controller WDM.inf). This file contains all the information that Windows needs to install the correct device drivers.

If during installation in Windows, you will be prompted with a message warning that the driver software has not passed Windows Logo testing. Select Continue Anyway and proceed with the installation. The driver is completely tested and verified by Via, and safe to use.

When you see the Completing the Found New Hardware Wizard screen, click Finish to complete the driver installation.

Once the installer has finished copying the files. You will see the Installation Complete screen. Click Finish.

After you complete driver installations, you should restart your computer.

After restarting Windows, you will see the Via AC 97 Audio Controller WDM panel icon in your system tray (lower right corner of your desktop). Click on the icon to open the Via AC 97 Audio Controller WDM panel.

Go to Device Manager, check the devices under "Sound, video and game controllers". You will see the Via AC 97 Audio Controller WDM if you have completed the installation process correctly. Your AC 97 Audio Controller WDM is ready to use.